Office



(No Modul.)

A. J. GILBERFI1 & G. WENDLING.

PORTABLE OVEN.

Patented May 12,

WITNEEEEE: INVENTOR i liluirrnn Smarts Partnr trice.

PORTABLE oven.,

SPECIFCATION forming 'part of-Letters Patent No. 317,938, dated M'ay l2, 1885.

Application filed January 30, 1884. (No modeL) To all whom it may concern: Y

Be it known that we, ANDREW J. GILBERT and GEORGE WENDLING, both citizens of the United States, and residents ofl Norwalk, in the county of Fairfield and State of Connecticut, have invented new and useful Improvements in Portable Ovens, of which thcfollowi ing is a specification.

The object of our invention is to provide a simple, practicable, and efficient portable brick oven having all the advantages of the common brick ovens, and being at the same time so constructed that it may be moved about from place to place without injury to it and Without taking it apart.

In carrying out our invention we make a metallic base having provision for aiire-grate and ash-pan, and being adapted to support a brick floor with an insulating layer of sand below the brick to retain the heat, and we construct a superstructure of arched beams supporting a brick covering and sand -jacket with a metallic cover to retain the sand, and with a door-casing and door at one end to facilitate ingress, also with a smoke-pipe connection for the escape of the smoke, and having a damper to close the same when the heat is to be retained for baking, all as hereinafter fully described, reference being made to the accompanying drawings, in which- Figure l is a longitudinal sectional elevation of our improved portable oven. Fig. 2 is a transverse section of the same with the door shown in front elevation. Fig. 3 is a sectional detail of some of the parts on a larger scale. i

We make a base-platea, for the support of the floor or hearth, and also the arch for inclosing the floor, with a vertical marginal flange, b, to rest on a brick or other temporary or permanent support, c, also with a depressed section, d, embracing the larger interior or middle portion of the plate, and forming apan having an offset, e, in the side walls to support the bricksf of the hearth or door of the oven iiush with the surface of the plate, said offset being level with the lower edge of the ange b, and serving, if desired, for an inner bearing to rest on the brick wall or other support c. From the offset e, for the support of the brick floor, the depression d extends a suitable distance for containing an insulating layer, g, of sand of suitable depth for preventing the escape of the heat. Said plate a is also constructed with supporting-ledges t' fora tiregrate, lt, extending the length of the depressed portion d. near one side of the same, and with partitionsj extending from said ledges@l down to the bottom of the plate, which is made with an opening under the grate through which the ashes may fall into a pan, lc, attached to the under side of said plate, or it may be formed together with the bottom plate, if desired.

Along the middle ofthe depression d, and parallelwith the grate-supporting ledges i, we

` arrange avsupport, Z, for the meeting ends of the hearth-bricks f, over which we arrange a cross-bar, m, extending .from side toside of the' depression d, and resting on plate a at its ends, with one lor more bolts, n, extended down through support Z, and the plate to hold the bar in place for a binder to the door-bricks,

corners to allow the bar to set in iiush with the upper surface of the bricks.

Where the bolt or bolts u extend through the bottom of theV vplate we form a recess or recesses, o, for the ends of the bolts'and nuts, to prevent them from projecting below the bottom of the plate, for enabling the plate to rest tlat on any support in case it may be desired. v f

The ilange b and the ledge e of the plate a elevate said plate on the supports c, and form cavities under the marginal portions of said plate to be filled with sand g, to economize the heat.

Over the door or hearth f we arrange a brick arch, g, consisting of a single layer of suitablycurved bricks supported intermediately on the metal arched -beams t, and at the rear on the bevel-anged arched beam u with a vertical front end wall, o, and a curved back wall, w. The back end wall leans against the bevel-Hanged side of the arch-beam u for the bearing of its upper end, and the front end wall, o, has an opening through it for the doorway, and over said opening rests on the metallic doorway-arch x, which is as muchwider than the thickness of the Wall v as is. required for the thickness of the insulating sand-jacket y, with which we cover the brick top of the oven, and said doorway has a flange, z, at the `said bricks being rabbeted along the upper4 IOO outer edge which connects with the inside of the front end plate, a', of the exterior metal jacket or case for retaining the sand, which ease consists, besides said front end plate, of the arch b', made of several curved plates placed edge to edge and matched by an odset flange, c', of one plate overlapping the plain edge of the next, and the curved back end plate, d', which matches onto the rear ends of plates b by the ange e', offset on the inner sides of said plates b', forming aledge, against which the arched end of plate d bears,while the lower end, together with the lower edges of the lower-arch plates, b, and-the lower end of the front plate, a', rest on plate a inside of a vertical retaining-flange, p, on the upper surface of said plate a.

` The plates b also have an offset, e2, at the front end, forming a rabbet, in which a flange, f2, of the end plate, a', fits for the connection of thearch and the front end, a. The door f closes against the front side of the end plate, a', and a ledge, g', of the bottom plate, a, a little below the surface of the hearth,to allow the coals to be readily raked out after heating the furnace sufficiently for baking, said door opening to about the center of the width of the grate h to facilitate the iiring through said door and avoiding the use of a special door to the regrate.

At the rear end of the oven and diagonally 1 suitably to form a hole for the escape of the smoke, and fit in said hole a short section of pipe, i, having suitable beveled ends to correspond with the interior and exterior shapes of the oven-top; also, vflanges j to rest on lugs lo ofthe arch-beam u to hold said pipe in position on the outer jacket, and coincident with the( pipe z" we attach another pipe-section, Z, having a base, m/, containing a sliding damper, n', to close the passage and prevent the escape of the heat when the fire is removed and the oven is employed for baking.

We also propose to line the door with brick o to prevent waste of heat through it.

Fig. 8 shows the pipes i and Z', also damper n', on a larger scale, and the manner in which pipe i is connected to the beam u.

What we claim, and desire to secure-by Letters Patent, is-

1. The improved portable oven, consisting of the bottom plate, a, having brick hearth f, tire-grate h', and sand-lling g, in combination with arch-beams tu, brick cover q, c, and w, sand-jacket y, and the metallic sand-retaining jacket a', b., and d', constructed and arranged substantially as described.

2. The bottom plate, a, constructed with flange'b, depressed section d, grate-supports i, and partitions j, and having ledges e and brick-support l, in combination with a superstructure consisting of arch-beams, brick cover, sand-jacket, and a metallic sand-retaining jacket, substantially as described. i

3. In a brick top for portable ovens, the combination of the arch-beams tu, arch-backs q, and vertical front end wall, said front wall having a doorway and being supported on the frame x, and said wall w being supportedat the junction with the arch by the bevel flange of beam u, substantially as described.

4. The combination, with the oven-top,con

sisting of the archbeams, fire-brick, sandjacket, and metallic retainingj acket, of the piped', resting on the arch-beam u and extend-y ing through the tire-brick and-sand-jacket to the metallic retaining-jacket, and also of the pipe Z, having the slide-damper n in its base m', and being attached to the exterior of the metallic jacket coincident with the pipe i', substantially as described.

In witness whereof we have hereunto signed our names in the presence of two subscribing witnesses.

ANDREW J. GILBERT. GEORGE WENDLING.

Witnesses:

W. J. MORGAN, L. H. MORGAN. 

